About this 3D model

A simple reef rack I designed for my reeftank. I use 22mm x 6mm isolated magnets for this one. Link to a german shop: https://www.maqna.de/gummierter-neodym-scheibenmagnet-22x6mm-vernickelt-grade-n42 The hole dimenson for the frags is 13,5 mm I printed mine without supports in PETG